Apparatus for delivering liquid in measured quantities.



A. JAGOBSON. APPARATUS POR DELIVERING LIQUID IN MEASURBD QUANTITIES.

APPLIUATION FILED MAB.. 9, 1911.

Patented Aug. 29, 1911.

COLUMBIA PLANUURAPH C0.. WASHINGTON. D. C.

ANDREW JACOBSON, COUNCIL BLUFFS, IOWA.

APPARATUS FOR DELIVERING LIQUID IN MEASURED QUANTITIES.

Specification of Letters Patent.

Application filed March 9, 1911.

Patented Ang. 29, 1911. Serial No. 613,448.

To all whom 'it may concern:

Be it known that I, ANDREW JAooBsoN, a citizen of the United States, residing at Council Bluifs, in the county of Pottawattamie and State of Iowa, have invented a certain new and useful Improvement in Apparatus for Delivering Liquid in Measured Quantities, of which the following is a specication.

The invention relates to flow regulators or apparatus for feeding predetermined volumes of liquid, as for example, the addition of purifying solutions to the water delivered by the pumps in municipal water-supply plants, or analogous situations.

The object of the invention is to provide means whereby the purifying solution is automatically fed in direct proportion to the volume of water delivered at each reciprocation of the pump plunger, and also to provide adjustments by which the quantity of solution delivered maybe varied as required, and means for insuring the positive reception and delivery of the full charge for which the apparatus is adjusted.

lThe invention consists in certain 'novel features and'details of construction and arrangement by which the above objects are attained, to be hereinafter described and pointed out in the claims. Y

The accompanying drawings form a part of this specification and show an approved form of the invention.

Figure 1 is aside elevation of the apparatus. Fig, 2 isa plan view. Fig. 3 is an end view, certain portions beingV shown in vertical transverse section, taken on the line 3-3 in Fig. l and seen in the direction indicated by the arrows. Fig. 4 is a longitudinal vertical section, taken on the axial line, and partly in elevation. Fig.z 5-is a plan or top Y.view showing a portion removed. Fig. 6 is a view of the under portionof another portion alone. Fig. 7 is a vertical axialsection, corresponding to a portion of Fig. 4 but on a larger scale. Similar letters of reference indicate the same `parts in all the i'igures` A is a cylinder shown as open at both ends,receiving a plunger B attached to and reciprocated by a plunger-rod B1 moved synchronously with the pump rod of a pump, not shown, and which for the purposes of this description may be understood to be a continuation or extension of such pump rod.

A loose piston C in the cylinder is bored axially to receive the plunger-rod and to move horizontally relatively thereto, and is provided with a stuffing-box C1 to prevent leakage' around the inclosed rod. On the outer face of the loose piston is a bar C2 extending beyond the open cylinder end and upturned to form an arm C3 by which the loose piston is reciprocated. The arm C3 is received in a Alongitudinal slot Z in a frame D fixed on the cylinder and projecting therefrom, above and parallel with the plungerrod B1.

Attached to the plunger-rod at any convenientpoint beyond the cylinder end is a bar F extending vertically and bent to form a horizontal plate F1 lying parallel with the frame D and above the latter, and is reciprocated relatively to the frame by the movements of the plunger rod. On the under face of the plate F1 are two spring-pawls G and H lying parallel with and close to each other and extending in opposite directions side by side; each has a notch g, h in the edge adjacent to the other, adapted under conditions to be described, to engage the end of the arm C3 protruding through the slot d in the frame D.

The pawl G is adjustable longitudinally of the plate F1 by means of a bolt in the slot f held by a thumb-nut G1, the pawl I-I may be similarly mounted but as its function is positive it is preferably riveted in place on the plate.

At each end of the frame D and on opposite sides of its upper face are cam surfaces or swells D1 D2 of less width than the pawls and serving each to lift one of the latter when the pawls are drawn into contact therewith near the termination of the movement of the plate F1 in each direction.

A1 is an inlet port for the cylinder, receiving through the pipe A2 the liquid to be measured and delivered, and A3 is the delivery port located in advance of the inlet and having a delivery pipe A1.

With the parts conditioned as shown by the full lines in Fig. l, as obtains at the termination of the inward stroke of the plunger-rod B1 corresponding to the end of the outward stroke of the pump rod, not shown, the operation of the apparatus is as follows z-The plunger B is at one side of the inlet port A1 and the loose piston C at the other side of t-he same, the space between being the measure of liquid received from the inlet port to be transferred and delivered. The notch g in the pawl G is engaged with the arm C3 and the outward movement of the plunger-rod carries the plunger B and piston C forward together in the same relative positions, to the delivery port A3, as indicated by the light dotted lines in Fig. 4, thus closing the inlet port. In this position the pawl G has ridden upon the swell D1 and been Alifted from engagement with the arm C3. The movement of the piston C is then arrested, or if continued by the friction of the stuffing-box C1 is arrested by the contact of the arm C3 with the stop formed by the outer end of the slot d. A further outward movement of the plunger-rod draws the plunger to or against the inner face of the piston so that the latter is carried along until arrested by the above mentioned stop with the inner face of the piston in line with the outer edge of the delivery port A3, in the position indicated by the heavy dotted lines in Fig. 4, and forces all the transferred liquid through the delivery port A3. During the main portion of this outward movement the pawl H has descended the swell D2 and traveled idly to the outer end of the frame D and in the extreme latter part of its travel has ridden upon the arm C3 and engaged it in the notch L ready for the return stroke. The plunger B and piston C t-hus make the return stroke with their adjacent faces in contact or close together until the arm C3 is released by the rise of t-he pawl H on the swell D2 and further movement of the piston is arrested by the contact of the arm C3 with the stop formed by the inner end of the slot d; the plunger-rod continues its inward. movement, separating the plunger from the piston and again engaging the pawl G with the arm C3 ready for the next reciprocation with a succeeding charge of liquid.

It will be noted that the separation of the plunger and piston is at the termination of the inward stroke and insures the intake of a full charge at the inlet port, and the approach of the same parts at the termination ofthe outward stroke insures the complete delivery of the charge thus taken.

By the employment of this apparatus an exact predetermined quantity of purifying solution or other liquid is delivered at each reciprocation of the pump, not shown, which also delivers an exact though much larger volume, so that the proportion of solution thus automatically added to the water to be purified is always in exact ratio to the latter and is always uniform regardless of the speed at which the pump may be driven.

fications may be made in the forms and proportions of the arts without departing from the invention in making such adaptations.

The plunger-rod may be driven from any portion of the pump mechanism which will give the required stroke and actV synchronously therewith, and it is not essential that a delivery from the apparatus be made at each stroke of the pump. It may be so connected and timed with the pump mechanism as tomake a delivery for every two, three, or other number of pump reciprocations. v

The feed is entirely` automatic, commencing when the pump is started and ceasing when the pump is stopped.

I claim A l. In an apparatus of the character described, a cylinder having separated inlet and discharge ports, a plunger in said cylinder and a plunger-rod therefor, a loose piston in said cylinder and inclosing said rod, means actuated by the reciprocations of said rod for moving said piston, and stops limiting the movements of said piston, whereby a quantity of liquid received between said plunger and pistonA at` said inlet port is transferred to anddischarged from said discharge port, all substantially as, and for the purpose set forth. 2. A cylinder having separated inlet and discharge ports, a plunger in said cylinder and a plunger-rod therefor, a loose piston in said cylinder and inclosingvsaid rod, an arm on said piston extending to the exterior of said cylinder, means actuated by the reciprocations of said rod for engagingvsaid arm and thereby moving said piston, and stops in the path of said arm for arresting the movements of the latter and said piston in both directions before ,the termination of the plunger strokes in the, same directions. c

3. A cylinder having separated inlet and discharge ports, a plun er in Vsaid cylinder and a plunger-rod there or, a loose piston in said cylinder and inclosing said rod,'an arm on said piston extendingto the exterior of said cylinder, a fixed frame havingv a`slot therein receiving thefree end ofsaid arm and serving Yto limit the movementsv of said piston, a plate on vsaid rod, pawls carried by said plate and arranged to engage said arm, and means for disengaging said pawls.

4.- A cylinder having separated inlet and discharge ports, a plunger in said cylinder and a plunger-rod therefor, a loose piston in said cylinder and inclosing said rod, an arm on said piston extending to the exterior of said cylinder, a xed frame having a slot therein receiving the free end of said arm and serving to limit the movements of said piston, a plate on said rod, paWls carried by said plate and arranged to engage said arm, and cam-surfaces on said frame arranged to disengage said pavvls.

5. A cylinder having separated inlet and discharge ports, a plunger in said cylinder and a plunger-rod thereforJ a loose piston in said cylinder and inclosing said rod, an arm on said piston extending to the exterior of said cylinder, a fixed frame having a slot therein receiving the free end of said arm and serving to limit the movements of said piston, a plate on said rod, patvls carried by said plate and arranged to engage said arm, means for disengaging said paWls, and means for holding one of said pavvls in adjustment relatively to its disengaging means and to said arm.

6. A cylinder having separated inlet and discharge ports, a plunger in said cylinder and a plunger-rod therefor, a loose piston in said cylinder and inclosing said rod, an arm on said piston extending to the exterior of said cylinder, a fixed frame having a slot therein receiving the free end of said arm and serving to limit the movements of said piston, a plate on said rod, spring-paWls having notches for engaging said arm, and cam-surfaces on said frame arranged to disengage said pavvls.

In testimony that I claim the invention above set forth I affix my signature, in presence of two Witnesses.

ANDREW JACOBSON.

Witnesses:

PAUL W. BRADSHAW, FRANK S. HANS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

